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    <meta charset="UTF-8">
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    <title>Document</title>
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<body>
    <script>
        function Fn(){
            this.name = "张璐璐";
        }

        Fn.prototype.age = 38;
        Fn.prototype.say = function(){
            console.log(this.name,"今年"+this.age,"是个大大的好人");
        }

        let fn = new Fn();

        console.log(Fn.prototype === fn.__proto__)

        console.log(Fn.prototype.constructor === Fn)
        console.log(fn);
        fn.say();
    </script>
</body>
</html>